What is the largest % you have seen from aeromods alone ?
 

What is the largest % you have seen from aero-mods alone ?
Without engine off coasting or other tricks, how much FE increase have you guys gained from your aeromods ?

I'm not comfortable EOC, ( i can't anyways - it's an auto ) so I was just curious what kind of gains can be had from aeromods alone.

I know the question is very general and would vary greatly from vehicle to vehicle, but i was hoping i could get some response from some of you guys that have done serious aeromods with your cars.

Also, I have asked this question several times in the past, but haven't seen it in a dedicated thread that i remember.

I've never even tried to separate that out. Much of the benefit from aeromods comes from increased used of EOC.

I read somewhere (Hucho ?) that, in production vehicles, half the benefit from aero improvements comes from changes in engine size and transmission ratios.

You could compare the Aerocivic before and after to get an idea of the difference - the guy was hypermiling before and after so it is the same "techniques" being used, albeit adjusted for that car having improved aero (e.g. longer coasts)

Thanks Arragonis, but I can't engine off coast in my car, so I'm just curious to see what i could expect if i aeromodded my car and drove normally.


The largest increase i have seen is Phils' ( Aerohead ) truck that dropped from .44 down to .153 and gained around ten or so miles per gallon .

So if I drop my stock Cd of .31 down to AeroCivic numbers* ( .17 ? ) then i can expect a averaged gain of a how many miles per gallon without EOC ? I can usually get around 40 - 44 MPG on long highway trips with no stops, so perhaps i could crack 50 MPG ?

From what Phil had said in a previous post, it looks like i could gain maybe six or seven mpg tops, but then i see that 3 Wheeler gained nearly 10 mpg with his boattail addition, and this was on a car that had a lot less wake than the car that i have, and the test consisted of freeway driving with no EOC ( I'm assuming )

So a little confused here.

( * BTW, Me and Basjoos have the exact same car, but mine is automatic. )

Good question. I wasnt able to break 100 mpg til I removed my passenger side mirror and gut all teh unnecessary crap inside. Before hand it would be between lowering and gril lblocking. Blocking the whole front end I say yields the most and improved acceleration at and above highway speeds. :eek:

I did just this on my 400 mile trip with the Probe. Just driving steady 60mph, coasting down any really big hills. Passing people, not drafting.

EPA: 28 MPG hwy

Actual: 41 MPG hwy
Actual (rain): 34 MPG hwy

46% gain. The car is heavily aero-modified.

Then again with full hardcore hypermiling...

P&EOC no boattail: 45 MPG hwy (60% gain hwy)

If i could gain 46% over the cars stock 42 MPG highway rating, that would mean about 60 MPG ?

That sounds pretty nice !

how about the centurion? Now, that was a serious ecomod

128-mpg Diesel-Powered Sports Car

Cd, WHY are you still debating this??

What are you waiting for! Start modding!

The boat tail cost at least $500 and three weeks. Just keep that in mind for ROE. It might be harder to see gains as your FE gets better, too. Do it and find out!